If you're in the USA or UK, you can get 20% off anything and everything with voucher codes. Americans should apply the voucher hailtothechief at the checkout, while Brits need to use VATFREE. This can be applied on top of regular discounts, like these:

You can score up to 20% off an Assassin's Creed Brotherhood PC pre-order through a special quiz we've set up with GamersGate. Answer ten trivia questions, receiving 2% off the ticket price for you get correct.

There's also up to 60% off a wonderfully and terrifying large range of simulators, simulating everything from driving and ships to bungee jumping and demolition.